LTC3525 - 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
The LTC®3525-3/LTC3525-3.3/LTC3525-5 are high efficiency synchronous step-up DC/DC converters with output disconnect that can start up with an input as low as 0.85V. They offer a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline or Li-Ion applications. Only three small external components are required. The LTC3525 is offered in fixed output voltages of 3V, 3.3V or 5V.
The device includes a 0.5Ω N-channel MOSFET switch and a 0.8Ω P-channel synchronous rectifier. Peak switch current ranges from 150mA to 400mA, depending on load, providing enhanced efficiency. Quiescent current is an ultralow 7μA, maximizing battery life in portable applications.
Other features include <1μA shutdown current, antiringing control and thermal shutdown. The LTC3525 is available in a tiny 6-Lead SC70 package.
Features
Typical Application  | Applications
Packaging |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC3525ESC6-3.3#TRMPBF | SC-70 | E | $2.57 | $1.83 |
| LTC3525ESC6-3.3#TRPBF | SC-70 | E | $2.57 | $1.81 |
| LTC3525ESC6-3#TRMPBF | SC-70 | E | $2.57 | $1.83 |
| LTC3525ESC6-3#TRPBF | SC-70 | E | $2.57 | $1.81 |
| LTC3525ESC6-5#PBF | SC-70 | E | $2.57 | |
| LTC3525ESC6-5#TRMPBF | SC-70 | E | $2.57 | $1.83 |
| LTC3525ESC6-5#TRPBF | SC-70 | E | $2.57 | $1.81 |
| LTC3525ISC6-3.3#PBF | SC-70 | I | $2.86 | |
| LTC3525ISC6-3.3#TRMPBF | SC-70 | I | $2.86 | $2.00 |
| LTC3525ISC6-3.3#TRPBF | SC-70 | I | $2.86 | $2.00 |
| LTC3525ISC6-3#PBF | SC-70 | I | $2.86 | |
| LTC3525ISC6-3#TRMPBF | SC-70 | I | $2.86 | $2.00 |
| LTC3525ISC6-3#TRPBF | SC-70 | I | $2.86 | $2.00 |
| LTC3525ISC6-5#PBF | SC-70 | I | $2.86 | |
| LTC3525ISC6-5#TRMPBF | SC-70 | I | $2.86 | $2.00 |
| LTC3525ISC6-5#TRPBF | SC-70 | I | $2.86 | $2.00 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC879A-A | LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA | $75.00 |
| DC879A-B | LTC3525-5 Demo Board | Micropower Synchronous Step-Up, 1V to 4.5VIN, 5VOUT @ 175mA | $75.00 |
- R139 Reliability Data
- R415 - Reliability Data
- Dec 2005 Single Cell Step-Up DC/DC Converter Features 400mA Switch Current in an SC70 Package
- 采用 SC70 封装并具输出断接功能的 400mA 微功率同步升压型稳压器
- LTC3525 Footprints and Symbols
- LTC3525-3 Demo Circuit - Compact, High Efficiency Boost for Single Cell Alkaline (1-1.6V to 3V @ 65mA)
- LTC3525-3.3 Demo Circuit - Compact, High Efficiency Boost for Two Cell Alkaline or NiMH (1.8-3.2V to 3.3V @ 140mA)
- LTC3525-3.3 Demo Circuit - Single Alkaline or NiMH to 3.3V Converter (1-1.6V to 3.3V @ 60mA)
- LTC3525-5 Demo Circuit - Compact, High Efficiency Boost for Single Cell Li-Ion (3-4.2V to 5V @ 175mA)
